AutoResearchTimingDrift.h File Reference

Detailed Description

Issue #2994 repro: compounded per-sequence timing drift vs 3.10.3.

Replays the reporter's minimal sketch as faithfully as possible:

• 35-LED WS2812B ring on the legacy template addLeds path (WS2812B<PIN> -> ClocklessControllerImpl -> ClocklessIdf5 -> SlimBridgeController -> RMT5 driver) via LegacyClocklessProxy.
• FastLED.setMaxRefreshRate(800).
• millisDelay-gated 255-step fade: first step after 225ms, then 5ms cadence; FastLED.show() throttled to a 5ms cadence; delay(1000) between sequences.
• Records millis() elapsed per completed sequence — the value the reporter printed over serial. Theoretical period: 225 + 254*5 + 1000 = 2495ms. On 3.10.3 the reporter sees a rock-steady 2495; on master 2563-2752.

Deliberate deviations from the sketch (documented for reviewers):

• No setCpuFrequencyMhz(160): changing CPU clock mid-session risks the RPC serial link; the current CPU MHz is reported instead.
• No .setCorrection(TypicalLEDStrip): color correction only scales pixel values and does not affect pacing.
• The first recorded sequence is partial (no leading 225ms arm or 1000ms delay); the host skips index 0 when building the histogram.

Invoked via the timingDriftTest JSON-RPC handler registered in AutoResearchRemote.cpp. NOTE: blocks ~2.5s per iteration.

Definition in file AutoResearchTimingDrift.h.

#include "FastLED.h"
#include "fl/stl/int.h"
#include "fl/stl/singleton.h"
#include "LegacyClocklessProxy.h"
#include <Arduino.h>

Include dependency graph for AutoResearchTimingDrift.h:

Go to the source code of this file.

Classes
struct	autoresearch::timing_drift::DriftResult
struct	autoresearch::timing_drift::MillisDelay
	Faithful emulation of the millisDelay library used by the issue sketch: start(t) arms a deadline; justFinished() fires true exactly once when elapsed >= t; stop() disarms. More...
struct	autoresearch::timing_drift::TimingDriftState

Namespaces
namespace	autoresearch
namespace	autoresearch::timing_drift

Functions
DriftResult	autoresearch::timing_drift::run (int pin, int num_leds, int iterations)
TimingDriftState &	autoresearch::timing_drift::timingDriftState ()

Variables
constexpr int	autoresearch::timing_drift::kMaxIterations = 64
constexpr int	autoresearch::timing_drift::kMaxLeds = 256

---

Class Documentation

autoresearch::timing_drift::DriftResult

struct autoresearch::timing_drift::DriftResult

Class Members
uint32_t	cpu_mhz
uint32_t	iter_ms[kMaxIterations]
int	iterations
int	num_leds
int	pin
uint32_t	show_count
uint32_t	show_max_us
uint32_t	show_min_us
uint64_t	show_total_us
bool	valid_pin

autoresearch::timing_drift::TimingDriftState

struct autoresearch::timing_drift::TimingDriftState

Collaboration diagram for autoresearch::timing_drift::TimingDriftState:

Class Members
CRGB	leds[kMaxLeds]